Carburetor



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limfl Ma 28, 1929. A DN 1,115,184

CARBURETOR Filed Aug. 13, 192 6 Hllllllllllllllliii 1 smm\ a g; ge

Patented May 28, 1929.

JOSEPH AUDINO, OF EAST BRADY, PENNSYLVANIA.

CARIBURETOR.

Application filed August 13, 1926. Serial No. 128,980.

This invent-ion relates to improvements in carburetors, being an improvement upon the carburetor shown and described in my pending application entitled Carburetors. bearing Serial Number 76,789, which was filed December 21st, 1925, and sin'iilarly pertaining particularly to a carburetor in which no float is utilized, a direct flow of liquid fuel being fed to a motor. The flow of fuel is controlled by an automatic feed which. as a matter of fact, takes the place of the float as found in the common and welldrnown type of carburetors now on the market.

In the present invention the improvement lies primarily in the feed control device which is constructed in a manner to provide a better mixture and fuel control when the engine is idling.

The primary object of the invention is the provision of a carburetor whereby the motor fuel can be fed directly to the motor.

A further object of the invention is the provision of a carburetor in which the motor fuel is fed directly to the motor and the provision of automatic means controlled through the medium of the engine speed for controlling the feed of the fuel to the motor.

Another and further object of the invention is the provision of a carburetor of the character described which will increase the liquid fuel mileage and prevent the engine knocking.

Another and still further object of the invention is the provision of a carburetor of the character described, which is constructed in a manner to prevent fire in case of the eugine back-firing.

A still further object of the invention is the provision of a carburetor of the character described, which is cheap and simple of manufacture and readily adaptable as a replacement to the common form or carburetor usually found in use on hydrmarbon motors.

Another object of the invent ion is the pro vision of novel means for controlling and ad justing the amount of fuel fed to the motor when the motor is idling, as well as when the motor is running at. higher speed.

Other further objects and novel features of construction and improved results of the invention will appear in the following description and accompanying drawing.

In the drawing Figure 1 is a vertical sectional view of a carburetor built in accordance with the invention.

Fig. 2 is an enlarged vertical sectional view of the fuel feed control.

Fig. 3 is an enlarged detail view showing the manner of attaching the pin in the lower end of the adjusting screw.

Referring to the drawing in which like parts are designated by similar reference numerals throughout the description, 6 designates the main body or casting of the carburetor, which is provided at its one end with a flange 7, for fastening the carburetor to the intake manifold S of a hydrocarbon motor or the like.

The casting or main body portion of the carburetor is internally tapered slightly towards its open end 10, whereby this end of the body portion is slightly larger in diameter than the opposite inner end 7 thereof. A door 11 is provided for closing the open end of the casting, the door being provided with an opening 1% to permit the passage of air into the carburetor and intake manifold. The control of air to the carburetor and engine is controlled through the medium of a shutter 15, which is pivotally mounted as at 16, so as to control the size of toe opening 14 in the door. The shutter is provided with an operating handle 18.

A common form of butterfly valve 19 is mounted adjacent the inner end of the main carburetor housing or casting, the construetion of this valve being conventional in that the valve 19 is carried by a rotatably mounted shaft 20, which has its upper end extending through the carburetor casting and being pri vided with a bell-crank 21. One end 2:2 of the bell-crank is adapted to be connected with an operating member not shown} which is usually lead for the sake of convenience to the dash-board of the vehicle, or to such other convenient position as to be readily accessible for operation. There also provided the conventional form of stop which is adapted to be engaged by the stop member 24, which forms a part of the bellcrank.

A regulator comprising a washer-shaped member 25, and a flap-valve 26 is situated within the carburetor housing, being preferably positioned at a point approximately intermediate its ends. Due to the tapered inner walls of the carburetor or of the housing or casting 6, the washer-like member 25 is wedged and rigidly held in place. although. if desired, a set-screw may be provided, which penetrating the outer wall of the carburetor,

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will engage this member lurther locking it in position.

As rlearlv appeare in Fig. 1 ol the drawing. the tlap valve 2U is pivotally mounted on the washer-like memher as at 21'. and in.

its normal o1-ition eloses the opening in the wa her. A leve' 29 is rigidly attaelied to the llap-valve so as to move therewith. ti :1 lever extending through the washer opening; 251 to a point well in trout thereof.

The gasoline or other motor fuel is tel to the earlutretor through the medium (it two supply pipes 3t! and it], whieh makes it possihle to teed siniultanemisl v two tuels of di l'- t'erent rlniraeters and lilend them inunediatt l v het'ore l'eedinsr them to the -arhuretor and engine. The supply pipes are in eommunieation w th the tlldhtlat 32, whi l] is mounted above the plug or housing 31). lit-inn serewtlireadedlv attached in the upper end thereof, as at Ill. The plug or housing 313 is eou trneted to provide a time sliding: lit in the opening I35 in the earhuretor easting u. lieing held in plaee under resilient pressure as o'l' the pres sure ot' spring 231), whieh eiverts an upward pressure upon the L-shaped Market 3? is oliset h) a seeond spring- (not shown) \Ylllt'll exerts a downward pressure upon the hraeltet at the point where it is att'aehed to one side ot the *arhurrtor Casting.

The ehaniher 3; is provided with an upwardly extending; threaded end 35%. whit-h an ries a parking not it... provided ee'ntrally with an opening to, through which extends the adjusting stem 4]. provided at its upper end with a knurled head lit. The adjusting stem it it: earried eerew-threadedly as at 43. in a holl w tuhe 1-3 the upper end of the tithe 44; is tlu'e.nle=. as at to and arrest a. parking nut to. "The tuhe is turther provided with a squared or HItlflNHtlOl'! l7. through the medium ot whieh the tuhe ean he rotated.

Below the nut portion -17 the tUlJt is externallv threaded a at is. and these threads en Ie the threaded opening in of the part in; not 3t].

lhe lower end of the tuho ll is provided with :iot-lilte openings 50, h'lounted in the lower end o'l'the tul e ie a pin 51.2! portion of whirl] iin the tulle. while a portion ot the pin extends from the end of the tit e. 'the pin is providtw'l with an S- haped t'astentnti' niemher it"). Thi tai tening ineinl'e'r pa m-a t'iirorghtln;pinandhathe-Hhape-lportion .33 at ea: 11 side of the pin. The renter liar. or portion of the S-shaped ineniher is adapt d to lide in the elot 5H. and when in position the tuhe is het ween the pin and the extending po'rtions 53. The ends of the hints 5t] are often-t1 as at H. so that when the pin and its fastening meniher are jlushed upwartllv into the slot and slightly rotated the pin eannot drop out. 7

Supported upon the fattening m nnher hi and :11n'ronn'dingthe r1 ittittihle tithe it is a roll spring the upper end of which engages the tapered portion 56 ot' the tuhe. From this eonetruetion it will he apparent that: the tension ot the spring; is atlju tahle hr the mere rotation ot the tulle ll in the nut 31 Referring now to the housing I13, it will he seen that there is mounted in the lower end thereof a sleeve 5: whieh extends upvardl into the chamber 58 of the housing.

This sleeve at its lower end is provided with an opening 59, the inner end ot' which is formed in a tapered valve-seat till. A n edle valve 1 is mounted tor t'et'ipi'oratlon in the sleeve 5? and is provided with an enlarged head 62, while its opposite end is redueed and extends outwardly and downwardly he yond the housing, as at 31}. Immediately ahove the reduced end ot the needle valve, it is provided with a taper (34. adapted to sea .t upon the tapered inner end of the opening 60.

A plate ($5 is suitably mounted on roiled springs 66, whirl) are in turn positioned on the upper t'aee ol' the e'ontrol lever 29. This plate is normally in engagement with the outwardly efv'tendii'ug' end til} ot the needle valve.

A manual, eontrol For the flap valve 26 is provided in the torn] ot a helleranh (3T, whit-l1 is adapted to operate the shalt (3H, whirh in turn operates the t'orwardlv extending! arm (59, which is providetl in its end with a eup-rhapml depression Ttl. whieh engages the rod 71. The rod Tl e: ;tenda through the earhuretor hodv or (listing and upon the operation o t' the hell-eranlt lever will engage the eontrol lever :29 to raiee this lever tor the purpose of opening the needle valve. The rod 71 is normally in the posh tion shown in Fig. l of the drawings. hv rea-- son of the coil spring; Til.

A suitable eol'nleetion (not ehown) is led from the hell eranlt ('17 to a point. ot ronieie ienee for operation.

Attention is rolled to the tart that th needle valve til is provided with h lieal grooves 80 and that lay reason of these groovee inel feed to the t'tlllll'il'tl fi is a sured even when the needle valve is tilted out slightly from it5 se: t.

(J M/(Mime tt: t H lull lit t tt Po ition lautvn ii the llrawiog s, the ,Q'i'tsoline lied to the motor in elo ed. To enable the starting; ot the int tor. it is nt 'e'sary to aetuate the primer whit-n eo1npriee the iiperatii'ig arm tit and it' rod, 71. to raise the flap valve lever 29. whirh will ea use the plate ('35 to lift the needle-val and permit the passage of liquid toe! to the motor. it heing understood when the. arm is elevateth the t ap valve ia etirried to an open position. In starting the motor the throttle eontrol is always: open and for this rea on the l'intt'erti valve. w iieh i aetuafted too ill)

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through throttle control, will be in open position and will permit the suction of liquid fuel into the intake manifold of the engine.

After the engine is started, the operation of the carburetor is automatic. As the butterfly valve is opened wider a greater suction is created in the carburetor and this suction Working 011 the flap-valve will pull this valve open and in so doing will elevate the outer end of the control valve 29, which will in turn lift the needle-valve higher to permit the passage of a greater amount of fuel to the engine. The automatic operation of the carburetor can be controlled, to a large degree, by the position of the shutter 15, as the engine can suck a volume of air through the carburetor in amounts in proportion only to the size of the orifice or opening 14.

In a carburetor of the character here present, it is necessary that the construction be such that the amount of fuel fed to the motor when idling can be adjusted. as Well as to provide adjustment for the amount of. fuel when it is fed to the motor when it is running at higher speeds. The adjustment of the fuel feed for idling is had through the tube 4% and pin 51. When the motor is running slowly, the suction upon the flap-valve is very slight, and the upward force upon the lower end 63 of the needle-valve is not great. For this reason the carburetor feed control is set so that there is a clearance between the pin 51 and the head 62 of the needle-valve. The amount of clearance is adjustable by turning the tube 4&1 down or up in the nut 39. By reason of the clearance between the pin and the upper end of the needle-valve the motor when idling need only lift the weight of the needle-valve to permit the passage of a small amount of fuel into the carburetor. hen the motor is being run at a higher speed, however, the needle-valve head will engage the pin 51 and must raise this pin in the tube slot against the tension of the coiled spring 55. The tension of the coiled spring is adjustable through the medium of a nut 56.

The extreme open position of the needle valve is controlled through the adjusting stem 41. As clearly appears in Fig. 2 of the drawings, this stem is rotatable in the tubing above the stem 51, and can be set so that the lower end of the stem will engage and stop the upward movement of the pin 51, and consequently the needle-valve 61, at any position throughout the length of the slots 50.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. A carburetor comprising a housing having an air-intake and a fuel valve, means actuated by an intake of air to operate said valve, a yieldably mounted pin located to regulate the movement of the valve throughout a portion only of its travel, said pin being adjustable in respect to the valve, and a stop adjustable in respect to said pin for positively limiting the movement of the valve.

2. A carburetor comprising a housing having an air-intake and a fuel valve, means actuated by the intake of air to open said valve to permit the inflow of fuel, a pin yieldably mounted above said valve and slightly separated therefrom, said pin adapted to be engaged by the upward movement of the valve to regulate the movement thereof, and means to regulate the yieldable tension on said pin.

3. A carburetor comprising a housing having an air-intake and a fuel valve, means actuated by the intake of air to operate said valve to lift the same and permit the inflow of fuel, a tube mounted in the fuel line above said valve, a pin mounted in said tube for reciprocation against spring tension, means to regulate said tension, said pin slightly separated from the fuel valve and adapted to be engaged by the valve upon its upward movement, and adjustable means in said tube for positively stopping the upward movement of the pin and the fuel valve.

4. A carburetor comprising a housing having an air-intake and a fuel valve, means actuated by the intake of air to operate said valve, a tube mounted in the fuel line above the valve and carrying a pin mounted for reciprocation against spring tension, an adjustable stop mounted in the tube above the pin for limiting the movement thereof, means to adjust the spring tension upon the pin, and the tube adjustable in respect to the valve, whereby the parts can be arranged so that the valve is moved against an adjustable spring tension throughout a portion of its travel and the upward movement of the valve can be arrested at any desired point throughout its travel.

5. A carburetor comprising a housing having an air-intake and a fuel valve. means actuated by the intake of air to operate said valve, a yieldable pin located to regulate the movement of the valve throughout a portion only of its travel, and means to regulate the tension upon said yieldable pin. whereby the valve lifts during the lirst part of its travel against gravity and throughout a predetermined distance of the travel against an adjustable spring tension.

6. A carburetor comprising a housing having an air intake with a fuel inlet in its top. a valve normally closing said inlet, a flap valve in said air intake and normally closing the same, means mounted below said fuel valve and actuated by said flap valve for lifting the fuel valve and permitting the inflow of fuel, a tube mounted in the fuel line above said fuel valve and fuel inlet, a pin mounted in said tube for reciprocation against spring tension, means to regulate said tensioh, above said pin and slight]; flellll' llvd from the fuel valve and adapted to be engaged by the valve upon its upward move ment, an adjustable atop mounted in the tube above the pin for positively limiting the upward movement thereof, and the lube adjustable in respect to the valve, whereby the parts ean be arranged so that the first IHUYOIHBIIT of the valve is against the fort-e of gravity and a (-ontinued movement of the valve is against the adjustable and yieldable tension of the pin and the upward move ment of the valve ran be arrested at any desired point throughout its travel.

7. A em'buretor comprising a housing eonstituting the earburelor air intake. a hollow plug having therein a valve and a set therefor, said plug positioned in the upper face of said air intake housing and constituting a fuel inlet, the fuel valve in said plug having an end extending beyond the plug and into the air intake, means in said air intake below said valve and actuated by the passage of inlet air for raising and lowering said valve, a fuel line communicating with said plug. a tube in said fuel line. a pin yieldablv mounted in said tube and positioned slightly above and in htlllll'illfltl relie tion in reapeet to the fuel valve, an adjust able stop in said tube above said M eldably mounted. pin, and maid tube, pin and stop adjustable as a unit to and from said fuel valve, for the purpose desel'ibed.

in testimony whereof I hereunto allix my signature.

JOSEPH A UDINO. 

